Orbit Fit and Astrometric record for 02VD131

The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.

# Object: 02VD131   
# Created Sun Dec  5 02:09:29 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     19 observations of     19
# Arc:  17.95y
# First observation: 2002/11/07
#  Last observation: 2020/10/20
# Chi-squared of fit:    37.21 DOF:     32 RMS:  0.25
# Min/Max residuals:    -0.62    0.87
# Exact a, adot, b, bdot, g, gdot:
  1.570520E-05  2.297924E-02 -1.888179E-06  1.486690E-04  2.359500E-02  9.448355E-04
# Covariance matrix:
  1.6364E-13 -4.0180E-14  2.4826E-16 -2.0159E-16 -2.9439E-14 -7.5454E-14
 -4.0180E-14  5.1308E-14 -2.2110E-16  2.8644E-16 -9.8475E-14  1.1444E-13
  2.4826E-16 -2.2110E-16  1.2439E-13 -8.9286E-15 -7.0922E-17 -5.2861E-16
 -2.0159E-16  2.8644E-16 -8.9286E-15  1.6274E-15 -4.6792E-16  6.6358E-16
 -2.9439E-14 -9.8475E-14 -7.0922E-17 -4.6792E-16  6.2138E-13 -2.1066E-13
 -7.5454E-14  1.1444E-13 -5.2861E-16  6.6358E-16 -2.1066E-13  2.6422E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.781598   20.227144   -0.402956   -0.012344   -0.902357  2452585.665373
# Heliocentric elements and errors
Epoch:              2452586.5000  =  2002/11/08
Mean Anomaly:           46.39355 +/-     0.064
Argument of Peri:      244.49589 +/-     0.073
Long of Asc Node:       84.38504 +/-     0.006
Inclination:             0.85431 +/-     0.000
Eccentricity:         0.06273664 +/-    0.0001
Semi-Major Axis:     45.14088839 +/-    0.0070
Time of Perihelion: 2438310.4294 +/-      20.1
Perihelion:          42.30890067 +/-    0.0077
Aphelion:            47.97287612 +/-    0.0084
Period (y)              303.2937 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.47072052 +/-    0.0013
Ecliptic Y           15.34759187 +/-    0.0005
Ecliptic Z           -0.57819473 +/-    0.0000
Ecliptic XDOT        -0.00082625 +/-    0.0000
Ecliptic YDOT         0.00253651 +/-    0.0000
Ecliptic ZDOT         0.00001596 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.28694295 +/-    0.0013
Geocenter to KBO     42.38187894 +/-    0.0014
# Hcoef:  6.62

The following table shows the complete astrometric record for 02VD131. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (02VD131) followed by the observatory code and reference code for the source of the astrometry.

2002 11  07.16463  01 15 54.06   +07 10 50.8   22.3R 02VD131   695  Cg8319      
2002 11  07.27232  01 15 53.63   +07 10 48.2         02VD131   695  Cg8319      
2002 11  30.25812  01 14 35.70   +07 03 15.4   22.4R 02VD131   568  Cg8319      
2002 12  01.24981  01 14 33.05   +07 03 00.4         02VD131   568  Cg8319      
2002 12  01.32144  01 14 32.91   +07 02 58.7         02VD131   568  Cg8319      
2003 10  23.16513  01 21 52.92   +07 47 13.1   23.0R 02VD131   695  Cj4694      
2003 10  23.26048  01 21 52.48   +07 47 10.5         02VD131   695  Cj4694      
2003 11  20.13563  01 20 00.45   +07 36 16.1   22.8R 02VD131   695  Cj4694      
2003 11  20.21942  01 20 00.15   +07 36 14.5         02VD131   695  Cj4694      
2004 09  13.33140  01 29 31.55   +08 33 09.8   22.6R 02VD131   304  Cl4339      
2004 09  13.33377  01 29 31.55   +08 33 09.8         02VD131   304  Cl4339      
2004 09  13.35563  01 29 31.47   +08 33 09.4         02VD131   304  Cl4339      
2004 09  13.35800  01 29 31.46   +08 33 09.2         02VD131   304  Cl4339      
2013 10  05.43707  02 12 22.63   +12 36 41.4   22.6R 02VD131   695  C~0zdT      
2013 10  05.50088  02 12 22.38   +12 36 40.4         02VD131   695  C~0zdT      
2013 10  06.45646  02 12 18.42   +12 36 19.5         02VD131   695  C~0zdT      
2020 10  20.309230 02 45 53.852  +15 25 10.68  23.1G 02VD131   G37  C~4KoC      
2020 10  20.372330 02 45 53.555  +15 25 09.88        02VD131   G37  C~4KoC      
2020 10  20.451650 02 45 53.248  +15 25 08.06        02VD131   G37  C~4KoC      

The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.

     1   0.0000      0.00    -0.21       0.00     0.36
     2   0.0003      0.00    -0.14       0.00     0.27
     3   0.0632      0.00     0.11       0.00    -0.01
     4   0.0659      0.00     0.06       0.00     0.01
     5   0.0661      0.00     0.87       0.00    -0.62
     6   0.9582      0.00    -0.02       0.00     0.03
     7   0.9585      0.00    -0.23       0.00    -0.09
     8   1.0348      0.00    -0.27       0.00    -0.12
     9   1.0351      0.00    -0.36       0.00    -0.07
    10   1.8512      0.00    -0.06       0.00     0.04
    11   1.8513      0.00     0.07       0.00     0.09
    12   1.8513      0.00     0.07       0.00     0.16
    13   1.8513      0.00     0.05       0.00     0.01
    14  10.9111      0.00    -0.06       0.00    -0.21
    15  10.9113      0.00     0.18       0.00     0.17
    16  10.9139      0.00     0.04       0.00    -0.06
    17  17.9525      0.00    -0.12       0.00    -0.22
    18  17.9527      0.00    -0.33       0.00     0.24
    19  17.9529      0.00     0.39       0.00     0.02

The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.

02VD131    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.509    45.509    45.509
ecceobj         0.070     0.070     0.070
incobj          0.853     0.853     0.853
qmin           42.000    41.996    42.000
qmax           49.083    49.051    49.090
amean          45.424    45.413    45.427
amin           45.308    45.307    45.309
amax           45.556    45.536    45.557
emean           0.064     0.064     0.064
emin            0.049     0.050     0.049
emax            0.078     0.077     0.078
imean           0.983     0.983     0.983
imin            0.407     0.407     0.407
imax            1.332     1.332     1.331
excite_mean     0.067     0.067     0.066
fracstop        1.000     1.000     1.000
cjmean          3.113     3.113     3.114

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
libcent 1      -180.0    -180.0    -180.0
libamp  1      -180.0    -180.0    -180.0
libcent 2      -180.0    -180.0    -180.0
libamp  2      -180.0    -180.0    -180.0
libcent 3      -180.0    -180.0    -180.0
libamp  3      -180.0    -180.0    -180.0
libcent 4      -180.0    -180.0    -180.0
libamp  4      -180.0    -180.0    -180.0

kozaimean       189.9     189.9     189.8
kozaiamp        180.0     180.0     180.0